Rose plant--Meinobroc variety

ABSTRACT

A new and distinct variety of Hybrid Tea rose plant is provided which forms elegant double red blossoms. The blossoms are vermilion red on the upper surface and cherry red on the under surface and are exceptionally attractive at the bud stage and at the beginning of the opening process. The plant exhibits a vigorous growth habit and is well suited for cut flower production under greenhouse conditions. Good resistance to fungus diseases is manifest.

SUMMARY OF THE INVENTION

The new variety of Hybrid Tea rose plant was created by artificialpollination wherein two parents were crossed which previously had beenstudied in the hope that they would contribute the desiredcharacteristics. The female parent (i.e., the seed parent) of the newvariety was the variety Jacqueline (U.S. Plant Pat. No. 2,183). The maleparent (i.e., the pollen parent) of the new variety was produced bycrossing an unintroduced variety with pollen from the Jelvanica variety.The parentage of the new variety can be summarized as follows:

    Jacqueline×(Unintroduced variety×Jelvanica).

The seeds resulting from the above pollination were sown in a greenhouseand 73 plantlets were obtained which were physically and biologicallydifferent from each other. Selective study resulted in theidentification of a single plant of the new variety.

It was found that the new variety of Hybrid Tea rose plant of thepresent invention possesses the following combination ofcharacteristics:

(a) forms elegant double red blossoms which are vermilion red on theupper surface and cherry red on the under surface,

(b) is particularly well suited for growing under greenhouse conditions,

(c) exhibits a vigorous growth habit, and

(d) exhibits good resistance to fungal diseases.

The new variety well meets the needs of the cut flower industry sincethe plant is strong and vigorous and grows well under greenhouseconditions.

The new variety has been found to undergo asexual propagation by anumber of routes, including budding, winter bench grafting, etc. Thecharacteristics of the new variety have been found to be strictlytransmissible by such asexual propagation from one generation toanother.

The new variety has been named the Meinobroc variety.

BRIEF DESCRIPTION OF THE PHOTOGRAPH

The accompanying photograph shows as nearly true as it is reasonablypossible to make the same, in a color illustration of this character,typical specimens of the plant parts of the new variety. The rose plantsof the new variety were observed during January while grafted on Rosaindica understock and growing in a greenhouse at Cap d'Antibes, France.

FIG. 1 illustrates a specimen of a young shoot;

FIG. 2 illustrates a specimen of a floral bud before the opening of thesepals;

FIG. 3 illustrates a specimen of a floral bud at the opening of thesepals;

FIG. 4 illustrates a specimen of a floral bud at the opening of thepetals;

FIG. 5 illustrates a specimen of a fully open flower--planview--obverse;

FIG. 6 illustrates a specimen of a fully open flower--planview--reverse;

FIG. 7 illustrates a specimen of a fully open flower immediately priorto petal drop--plan view--obverse;

FIG. 8 illustrates a specimen of a fully open flower immediately priorto petal drop--plan view--reverse;

FIG. 9 illustrates a specimen of a petal--upper surface;

FIG. 10 illustrates a specimen of a petal--under surface;

FIG. 11 illustrates a specimen of a floral receptacle showing thearrangement of the stamens and pistils;

FIG. 12 illustrates a specimen of a floral receptacle showing thearrangement of the pistils (stamens removed);

FIG. 13 illustrates a specimen of a flowering stem;

FIG. 14 illustrates a specimen of a main branch;

FIG. 15 illustrates specimens of leaf with three leaflets--undersurface;

FIG. 16 illustrates specimens of leaf with five leaflets--upper surface;and

FIG. 17 illustrates a specimen of a leaf with seven leaflets--uppersurface.

DETAILED DESCRIPTION

The chart used in the identification of the colors is that of The RoyalHorticultural Society (R.H.S. Colour Chart). The description is based onobservations made during January while grafted on Rosa indica understockand growing in a greenhouse at Cap d'Antibes, France.

Class: Hybrid tea.

Plant:

Height.--Plants which were pruned to a height of 85 cm. produced floralstems having a length of approximately 40 to 70 cm.

Habit.--Upright.

Branches:

Color.--Young stems: Yellow-Green Group 146B. Adult wood: Yellow-GreenGroup 146A.

Leaves:

Petioles.--Upper surface: noticeable veination, reddish-brown on youngfoilage, medium green on adult foliage. Under surface: smooth lightgreen.

Leaflets.--Number 3, 5, and 7 (most often). Shape: elliptic. Serration:very simple and regular. Texture: tough. General appearance: ample anddense with a somewhat glossy surface. Color (young foliage): uppersurface: reddish-brown. under surface: reddish-brown. Color (adultfoliage): upper surface: dark green. Yellow-Green Group 147A, often withreddish serration. under surface: medium green, Yellow-Green Group 147B.

Inflorescence:

Number of flowers.--Generally one per stem.

Peduncle.--Straight and rigid, approximately 7 cm. on average.

Buds.--Shape: oblong. Length: approximately 3 cm. on average. Color uponopening: upper surface: carmine red, Red Group 46B. under surface: deepdull red, Red Group 46A, more or less suffused with black.

Flower.--Shape: sides are substantially parallel and petals are fullydouble. Diameter: approximately 10 cm. on average. Color (when openingbegins): upper surface: deep vermilion red, Red Group 44A on externalpetals, and medium vermilion red, Red Group 44B on inner petals. undersurface: deep dull red, Red Group 46A, slightly lighter on the innerpetals. Color (when partially open): upper surface: bright vermilionred, Red Group 44B. under surface: dull cherry red, Red Group 45B. Color(at end of opening): upper surface: bright vermilion red, Red Group 44B.under surface: dull cherry red, Red Group 45B. Fragrance: slight.Lasting quality: long. Petal number: approximately 30 on average. Petalform: usually flat and slightly pointed at the tip, a few incompletepetals sometimes are present near the stamens. Stamen number:approximately 113 on average. Anthers: golden yellow with margins offuschia.

Development:

Disease resistance.--Exhibits good resistance to major fungal diseaseswhich commonly attack roses.

I claim:
 1. A new and distinct variety of Hybrid Tea rose plantcharacterized by the following combination of characteristics:(a) formselegant double red blossoms which are vermilion red on the upper surfaceand cherry red on the under surface, (b) is particularly well suited forgrowing under greenhouse conditions, (c) exhibits a vigorous growthhabit, and (d) exhibits good resistance to fungal diseases;substantiallyas herein shown and described.